core/org.argeo.suite.ui/src/org/argeo/suite/ui/widgets/TabbedArea.java

   1 package org.argeo.suite.ui.widgets;
   2
   3 import java.util.ArrayList;
   4 import java.util.List;
   5
   6 import javax.jcr.Node;
   7
   8 import org.argeo.cms.ui.CmsUiProvider;
   9 import org.argeo.cms.ui.util.CmsUiUtils;
  10 import org.argeo.cms.ui.viewers.Section;
  11 import org.argeo.eclipse.ui.Selected;
  12 import org.argeo.jcr.Jcr;
  13 import org.eclipse.swt.SWT;
  14 import org.eclipse.swt.graphics.Image;
  15 import org.eclipse.swt.layout.FormLayout;
  16 import org.eclipse.swt.layout.GridData;
  17 import org.eclipse.swt.layout.GridLayout;
  18 import org.eclipse.swt.widgets.Button;
  19 import org.eclipse.swt.widgets.Composite;
  20 import org.eclipse.swt.widgets.Control;
  21 import org.eclipse.swt.widgets.Label;
  22 import org.eclipse.swt.widgets.ToolBar;
  23 import org.eclipse.swt.widgets.ToolItem;
  24
  25 /** Manages {@link Section} in a tab-like structure. */
  26 public class TabbedArea extends Composite {
  27         private static final long serialVersionUID = 8659669229482033444L;
  28
  29         private Composite headers;
  30         private Composite body;
  31
  32         private List<Section> sections = new ArrayList<>();
  33
  34         private Node previousNode;
  35         private CmsUiProvider previousUiProvider;
  36         private CmsUiProvider currentUiProvider;
  37
  38         private String tabStyle;
  39         private String tabSelectedStyle;
  40         private String bodyStyle;
  41         private Image closeIcon;
  42
  43         public TabbedArea(Composite parent, int style) {
  44                 super(parent, style);
  45                 CmsUiUtils.style(parent, bodyStyle);
  46
  47                 setLayout(CmsUiUtils.noSpaceGridLayout());
  48
  49                 // TODO manage tabs at bottom or sides
  50                 headers = new Composite(this, SWT.NONE);
  51                 headers.setLayoutData(CmsUiUtils.fillWidth());
  52                 body = new Composite(this, SWT.NONE);
  53                 body.setLayoutData(CmsUiUtils.fillAll());
  54                 body.setLayout(new FormLayout());
  55                 emptyState();
  56         }
  57
  58         protected void refreshTabHeaders() {
  59                 int tabCount = sections.size() > 0 ? sections.size() : 1;
  60                 for (Control tab : headers.getChildren())
  61                         tab.dispose();
  62
  63                 headers.setLayout(CmsUiUtils.noSpaceGridLayout(new GridLayout(tabCount, true)));
  64
  65                 if (sections.size() == 0) {
  66                         Composite emptyHeader = new Composite(headers, SWT.NONE);
  67                         emptyHeader.setLayoutData(CmsUiUtils.fillAll());
  68                         emptyHeader.setLayout(new GridLayout());
  69                         Label lbl = new Label(emptyHeader, SWT.NONE);
  70                         lbl.setText("");
  71                         lbl.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, false));
  72
  73                 }
  74
  75                 Section currentSection = getCurrentSection();
  76                 for (Section section : sections) {
  77                         boolean selected = section == currentSection;
  78                         Composite sectionHeader = section.createHeader(headers);
  79                         CmsUiUtils.style(sectionHeader, selected ? tabSelectedStyle : tabStyle);
  80                         int headerColumns = 2;
  81                         sectionHeader.setLayout(new GridLayout(headerColumns, false));
  82                         sectionHeader.setLayout(CmsUiUtils.noSpaceGridLayout(headerColumns));
  83                         Button title = new Button(sectionHeader, SWT.FLAT);
  84                         CmsUiUtils.style(title, selected ? tabSelectedStyle : tabStyle);
  85                         title.setLayoutData(CmsUiUtils.fillWidth());
  86                         title.addSelectionListener((Selected) (e) -> showTab(tabIndex(section.getNode())));
  87                         Node node = section.getNode();
  88                         title.setText(Jcr.getTitle(node));
  89                         ToolBar toolBar = new ToolBar(sectionHeader, SWT.NONE);
  90                         ToolItem closeItem = new ToolItem(toolBar, SWT.FLAT);
  91                         if (closeIcon != null)
  92                                 closeItem.setImage(closeIcon);
  93                         else
  94                                 closeItem.setText("X");
  95                         CmsUiUtils.style(closeItem, selected ? tabSelectedStyle : tabStyle);
  96                         closeItem.addSelectionListener((Selected) (e) -> closeTab(section));
  97                 }
  98
  99         }
 100
 101         public void view(CmsUiProvider uiProvider, Node context) {
 102                 if (body.isDisposed())
 103                         return;
 104                 int index = tabIndex(context);
 105                 if (index >= 0) {
 106                         showTab(index);
 107                         previousNode = context;
 108                         previousUiProvider = uiProvider;
 109                         return;
 110                 }
 111                 Section section = (Section) body.getChildren()[0];
 112                 previousNode = section.getNode();
 113                 if (previousNode == null) {// empty state
 114                         previousNode = context;
 115                         previousUiProvider = uiProvider;
 116                 } else {
 117                         previousUiProvider = currentUiProvider;
 118                 }
 119                 currentUiProvider = uiProvider;
 120                 section.setNode(context);
 121                 section.setLayoutData(CmsUiUtils.coverAll());
 122                 build(section, uiProvider, context);
 123                 if (sections.size() == 0)
 124                         sections.add(section);
 125                 refreshTabHeaders();
 126                 layout(true, true);
 127         }
 128
 129         public void open(CmsUiProvider uiProvider, Node context) {
 130                 if (previousNode != null && Jcr.getIdentifier(previousNode).equals(Jcr.getIdentifier(context))) {
 131                         // does nothing
 132                         return;
 133                 }
 134                 if (sections.size() == 0)
 135                         CmsUiUtils.clear(body);
 136                 Section currentSection = getCurrentSection();
 137                 int currentIndex = sections.indexOf(currentSection);
 138                 Section previousSection = new Section(body, SWT.NONE, context);
 139                 build(previousSection, previousUiProvider, previousNode);
 140                 previousSection.setLayoutData(CmsUiUtils.coverAll());
 141                 sections.add(currentIndex + 1, previousSection);
 142                 refreshTabHeaders();
 143                 layout(true, true);
 144         }
 145
 146         public void showTab(int index) {
 147                 Section sectionToShow = sections.get(index);
 148                 sectionToShow.moveAbove(null);
 149                 refreshTabHeaders();
 150                 layout(true, true);
 151         }
 152
 153         protected void build(Section section, CmsUiProvider uiProvider, Node context) {
 154                 for (Control child : section.getChildren())
 155                         child.dispose();
 156                 CmsUiUtils.style(section, bodyStyle);
 157                 section.setNode(context);
 158                 uiProvider.createUiPart(section, context);
 159
 160         }
 161
 162         private int tabIndex(Node node) {
 163                 for (int i = 0; i < sections.size(); i++) {
 164                         Section section = sections.get(i);
 165                         if (Jcr.getIdentifier(section.getNode()).equals(Jcr.getIdentifier(node)))
 166                                 return i;
 167                 }
 168                 return -1;
 169         }
 170
 171         public void closeTab(Section section) {
 172                 int currentIndex = sections.indexOf(section);
 173                 int nextIndex = currentIndex == 0 ? 0 : currentIndex - 1;
 174                 sections.remove(section);
 175                 section.dispose();
 176                 if (sections.size() == 0) {
 177                         emptyState();
 178                         refreshTabHeaders();
 179                         layout(true, true);
 180                         return;
 181                 }
 182                 refreshTabHeaders();
 183                 showTab(nextIndex);
 184         }
 185
 186         protected void emptyState() {
 187                 new Section(body, SWT.NONE, null);
 188                 refreshTabHeaders();
 189         }
 190
 191         public Composite getCurrent() {
 192                 return getCurrentSection();
 193         }
 194
 195         protected Section getCurrentSection() {
 196                 return (Section) body.getChildren()[0];
 197         }
 198
 199         public void setTabStyle(String tabStyle) {
 200                 this.tabStyle = tabStyle;
 201         }
 202
 203         public void setTabSelectedStyle(String tabSelectedStyle) {
 204                 this.tabSelectedStyle = tabSelectedStyle;
 205         }
 206
 207         public void setBodyStyle(String bodyStyle) {
 208                 this.bodyStyle = bodyStyle;
 209         }
 210
 211         public void setCloseIcon(Image closeIcon) {
 212                 this.closeIcon = closeIcon;
 213         }
 214 }